The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 2000
Filed:
Aug. 29, 1997
Applicant:
Inventors:
Shinichi Yamashita, Yokohama, JP;
Koji Takahashi, Chigasaki, JP;
Kazuhiko Haruma, Tokyo, JP;
Nobukuni Roppongi, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
375240 ; 348405 ; 348404 ; 348403 ; 348402 ;
Abstract
A picture coding apparatus includes a first compressing device for offset sampling input signals, and a second compressing device, having at an orthogonal transform circuit and a quantization device, for compressing the output from the first compressing device, wherein the quantization levels of the quantization device are set so that high-frequency components along a predetermined direction are quantized precisely on the basis of the visibility of each frequency component discriminated by orthogonal transform on a display screen.